Brown University, US. Some constraint papers.

Online tutorial/textbook for beginners to the area of constraint programming. This area is of the set of less known software technologies, but is evolving rapidly and has a growing, significant commercial interest.

Generic Constraint Development Environment. Constraint solver implemented as C++ library. Main goals: modifiability, extensibility, speed. Features: integer and set variables, large constraint set, copying-based search. [Open Source, BSD]

Holds comp.constraints FAQ, pages of constraint-related pointers, source code for various systems, benchmarks, directory of people interested in constraints, constraint bibliographies, collection of online papers, links. Clearly the product of much work.

Frameworks and algorithms for analyzing and transforming scientific programs; 2 major components: the Omega test system to manipulate sets of affine constraints over integer variables; and developing frameworks to analyze and transform programs.

Personal page of Garnet inventor and lead researcher. Describes Garnet motives, rationale.

Constraints research group, Department of Computer Science and Engineering. Home of DeltaBlue, Cassowary. Neat constraint Java Applet demonstrates a theorem about quadrilaterals.

Covering all aspects of computing with constraints; on paper or online; fee required.

Attempt to make a system that is easier to learn and use than anything available to novice programmers today: HANDS: Human-centered Advances for Novice Development of Software. School of Computer Science, Carnegie Mellon University; NSF funded.

High-level programming language to write constraint systems; makes it easy to define constraint reasoning: simplification and propagation, and incremental solving (satisfaction) of constraints. Run and test CHR online; do a demo, try it now.